目的:探索表观弥散系数(apparent diffusion coefficient,ADC)在前列腺影像报告和数据系统(prostate imaging-reporting and data system,PI-RADS)3分且前列腺特异性抗原(prostate specific antigen,PSA)灰区患者中对减少非必要前列腺...目的:探索表观弥散系数(apparent diffusion coefficient,ADC)在前列腺影像报告和数据系统(prostate imaging-reporting and data system,PI-RADS)3分且前列腺特异性抗原(prostate specific antigen,PSA)灰区患者中对减少非必要前列腺穿刺活检的应用价值。方法:回顾性收集2019年1月—2023年12月在中国科学技术大学附属第一医院(安徽省立医院)泌尿外科接受经会阴前列腺穿刺活检患者的临床资料。对于PI-RADS 3分病灶ADC值的计算,由1位泌尿外科医生只选择病灶上最可疑的区域,即在ADC图像上最可疑区域依次绘制2个圆形感兴趣区(region of interest,ROI)(大小为10~20 mm~(-2)),影像系统将自动计算ADC值,最终的ADC值取2次绘制的ROI所对应ADC值的平均值,记为ADC_(min)。采用Mann-Whitney U检验比较各临床变量在良、恶性组的组间差异,使用受试者工作特征(receiver operating characteristic,ROC)曲线及其曲线下面积(area under curve,AUC)、灵敏度和特异度来评价各临床变量的诊断价值。结果:本研究共纳入121例患者,其中88例患者术后病理为良性、33例患者为前列腺癌(prostate cancer,PCa)(包括16例临床有意义前列腺癌患者)。前列腺体积(prostate volume,PV)、前列腺特异性抗原密度(prostate specific antigen density,PSAD)和ADC_(min)在组间比较时差异均有统计学意义。在诊断效能方面,ADC_(min)(AUC=0.810,95%CI:0.729~0.876)明显优于前列腺特异性抗原(PSA)(AUC=0.593,95%CI:0.446~0.630)、PV(AUC=0.691,95%CI:0.600~0.772)、PSAD(AUC=0.683,95%CI:0.592~0.765)。当ADC_(min)<600μm^(2)/s时,93.33%(14/15)的患者术后病理为PCa;当ADC_(min)>750μm^(2)/s时,仅有13.33%(10/75)的患者术后病理为PCa。结论:对于PI-RADS 3分且PSA灰区患者而言,ADC_(min)在区分前列腺穿刺活检术后病理良恶性中有很好的应用价值,ADC_(min)越小,患者患PCa的风险就越大。展开更多
Abstract. Let D （U, V, W） be an oriented 3-partite graph with ｜ U ｜ = p, ｜V｜ = q and ｜W ｜ = r. For any vertex x in D（U,V,W）, let dx^＋ and dui^- be the outdegree and indegree ofx respectively. Define aui （o...Abstract. Let D （U, V, W） be an oriented 3-partite graph with ｜ U ｜ = p, ｜V｜ = q and ｜W ｜ = r. For any vertex x in D（U,V,W）, let dx^＋ and dui^- be the outdegree and indegree ofx respectively. Define aui （or simply ai） = q ＋ r ＋ dui^＋ - dui^-, bvj （or simply b j） = p ＋ r ＋ d^＋vj - d^-vj and cwk （or simply ck） =p ＋ q ＋ dwk^＋ -dwk^- as the scores of ui in U,vj in V and wk in W respectively. The set A of distinct scores of the vertices of D（U, V, W） is called its score set. In this paper, we prove that if a1 is a non-negative integer, ai（2 ≤ i ≤ n - 1） are even positive integers and an is any positive integer, then for n 〉 3, there exists an oriented 3-partite graph with the score set A ={a1,Σ2i=1 ai,…,Σni=1 ai}, except when A = {0, 2, 3}. Some more results for score sets in oriented 3-partite graphs are obtained.展开更多
Objective: Coronary Artery Disease (CAD) would continue to concern medical society in the foreseeable future. Determining the extent of coronary luminal stenosis is a key factor in management of CAD. Methods presently...Objective: Coronary Artery Disease (CAD) would continue to concern medical society in the foreseeable future. Determining the extent of coronary luminal stenosis is a key factor in management of CAD. Methods presently used are costly and pose certain dangers, ranging from nephrotoxicity to death. Long Pentraxin or Pentraxin-3 (PTX3) has been used to predict survival or atherosclerotic process, but not to identify coronary stenosis. Calcium Score has been used to this end with some success. Methods: Individuals with chronic stable angina, without evidence of Myocardial Infarction (MI), who were categorized as intermediate-risk after completing a treadmill exercise test, according to Duke Protocol, underwent cardiac catheterization. In addition, blood samples were drawn for coronary sinus PTX3, and also PTX3, uric acid, high-sensitivity C-reactive protein (hs-CRP), cholesterol, glucose and High-Density Lipo-protein (HDL) in peripheral circulation. Calcium Scores were calculated using Agatston Score and non-contrast multi-slice CT scan. Participants were divided according to the number of stenotic coronary arteries (patent, one-, two-and three-vessel disease). Results: We found that PTX3 levels in coronary sinus and femoral vein correlated with each other, after log-transforming the values. Also we found that PTX3 levels and Calcium Scores differed among individuals with triple-vessel involvement and individuals without significant stenosis in any of coronary arteries. No significant differences were observed, regarding hs-CRP levels. Conclusion: PTX3 levels in periphery correlate with those in coronary arteries, and this variable can be measured with a less invasive procedure. In addition to Calcium Score, PTX3 levels are different in our four groups. The combined contribution of PTX3 and calcium score may help us identify individuals with significant coronary artery stenosis without needing to perform cardiac catheterization in a select group of patients.展开更多
文摘目的:探索表观弥散系数(apparent diffusion coefficient,ADC)在前列腺影像报告和数据系统(prostate imaging-reporting and data system,PI-RADS)3分且前列腺特异性抗原(prostate specific antigen,PSA)灰区患者中对减少非必要前列腺穿刺活检的应用价值。方法:回顾性收集2019年1月—2023年12月在中国科学技术大学附属第一医院(安徽省立医院)泌尿外科接受经会阴前列腺穿刺活检患者的临床资料。对于PI-RADS 3分病灶ADC值的计算,由1位泌尿外科医生只选择病灶上最可疑的区域,即在ADC图像上最可疑区域依次绘制2个圆形感兴趣区(region of interest,ROI)(大小为10~20 mm~(-2)),影像系统将自动计算ADC值,最终的ADC值取2次绘制的ROI所对应ADC值的平均值,记为ADC_(min)。采用Mann-Whitney U检验比较各临床变量在良、恶性组的组间差异,使用受试者工作特征(receiver operating characteristic,ROC)曲线及其曲线下面积(area under curve,AUC)、灵敏度和特异度来评价各临床变量的诊断价值。结果:本研究共纳入121例患者,其中88例患者术后病理为良性、33例患者为前列腺癌(prostate cancer,PCa)(包括16例临床有意义前列腺癌患者)。前列腺体积(prostate volume,PV)、前列腺特异性抗原密度(prostate specific antigen density,PSAD)和ADC_(min)在组间比较时差异均有统计学意义。在诊断效能方面,ADC_(min)(AUC=0.810,95%CI:0.729~0.876)明显优于前列腺特异性抗原(PSA)(AUC=0.593,95%CI:0.446~0.630)、PV(AUC=0.691,95%CI:0.600~0.772)、PSAD(AUC=0.683,95%CI:0.592~0.765)。当ADC_(min)<600μm^(2)/s时,93.33%(14/15)的患者术后病理为PCa;当ADC_(min)>750μm^(2)/s时,仅有13.33%(10/75)的患者术后病理为PCa。结论:对于PI-RADS 3分且PSA灰区患者而言,ADC_(min)在区分前列腺穿刺活检术后病理良恶性中有很好的应用价值,ADC_(min)越小,患者患PCa的风险就越大。
文摘Abstract. Let D （U, V, W） be an oriented 3-partite graph with ｜ U ｜ = p, ｜V｜ = q and ｜W ｜ = r. For any vertex x in D（U,V,W）, let dx^＋ and dui^- be the outdegree and indegree ofx respectively. Define aui （or simply ai） = q ＋ r ＋ dui^＋ - dui^-, bvj （or simply b j） = p ＋ r ＋ d^＋vj - d^-vj and cwk （or simply ck） =p ＋ q ＋ dwk^＋ -dwk^- as the scores of ui in U,vj in V and wk in W respectively. The set A of distinct scores of the vertices of D（U, V, W） is called its score set. In this paper, we prove that if a1 is a non-negative integer, ai（2 ≤ i ≤ n - 1） are even positive integers and an is any positive integer, then for n 〉 3, there exists an oriented 3-partite graph with the score set A ={a1,Σ2i=1 ai,…,Σni=1 ai}, except when A = {0, 2, 3}. Some more results for score sets in oriented 3-partite graphs are obtained.
文摘Objective: Coronary Artery Disease (CAD) would continue to concern medical society in the foreseeable future. Determining the extent of coronary luminal stenosis is a key factor in management of CAD. Methods presently used are costly and pose certain dangers, ranging from nephrotoxicity to death. Long Pentraxin or Pentraxin-3 (PTX3) has been used to predict survival or atherosclerotic process, but not to identify coronary stenosis. Calcium Score has been used to this end with some success. Methods: Individuals with chronic stable angina, without evidence of Myocardial Infarction (MI), who were categorized as intermediate-risk after completing a treadmill exercise test, according to Duke Protocol, underwent cardiac catheterization. In addition, blood samples were drawn for coronary sinus PTX3, and also PTX3, uric acid, high-sensitivity C-reactive protein (hs-CRP), cholesterol, glucose and High-Density Lipo-protein (HDL) in peripheral circulation. Calcium Scores were calculated using Agatston Score and non-contrast multi-slice CT scan. Participants were divided according to the number of stenotic coronary arteries (patent, one-, two-and three-vessel disease). Results: We found that PTX3 levels in coronary sinus and femoral vein correlated with each other, after log-transforming the values. Also we found that PTX3 levels and Calcium Scores differed among individuals with triple-vessel involvement and individuals without significant stenosis in any of coronary arteries. No significant differences were observed, regarding hs-CRP levels. Conclusion: PTX3 levels in periphery correlate with those in coronary arteries, and this variable can be measured with a less invasive procedure. In addition to Calcium Score, PTX3 levels are different in our four groups. The combined contribution of PTX3 and calcium score may help us identify individuals with significant coronary artery stenosis without needing to perform cardiac catheterization in a select group of patients.
